Docker images for cross-building Beats

Author: andrewkroh

.editorconfig

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+# See: http://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.yml]
+indent_style = space
+indent_size = 2
+
+[Dockerfile]
+indent_style = space
+indent_size = 2
+
+[Makefile]
+indent_style = tab

.gitignore

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+*.iml
+*.swp
+*.o
+.idea
+.vagrant
+_obj

Makefile

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+build:
+	@make -C go1.10 $@
+	@make -C go1.10 -f Makefile.debian7 $@
+	@make -C fpm $@
+
+# Requires login at https://docker.elastic.co:7000/.
+push:
+	@make -C go1.10 $@
+	@make -C go1.10 -f Makefile.debian7 $@
+	@make -C fpm $@
+
+.PHONY: build push

Makefile.common

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+REPOSITORY    := docker.elastic.co/beats-dev
+VCS_REF       := $(shell git rev-parse HEAD)
+VCS_URL       := https://github.com/elastic/golang-crossbuild
+BUILD_DATE    := $(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
+.DEFAULT_GOAL := build
+
+# Requires login at https://docker.elastic.co:7000/.
+push:
+	echo ">> Pushing $(REPOSITORY)/$(NAME):$(VERSION)$(SUFFIX)$(TAG_EXTENSION)"
+	@docker tag "$(REPOSITORY)/$(NAME):$(VERSION)$(SUFFIX)$(TAG_EXTENSION)" "push.$(REPOSITORY)/$(NAME):$(VERSION)$(SUFFIX)$(TAG_EXTENSION)"
+	@docker push "push.$(REPOSITORY)/$(NAME):$(VERSION)$(SUFFIX)$(TAG_EXTENSION)"
+
+.PHONY: push

README.md

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+# golang-crossbuild
+
+golang-crossbuild is a set of Docker images containing the requisite
+cross-compilers for cross compiling Go applications. The cross-compilers are
+needed when the application uses [cgo](https://golang.org/cmd/cgo/).
+
+The base image used is Debian 9 (stretch) unless otherwise specified.
+
+## Docker Repo
+
+`docker.elastic.co/beats-dev/golang-crossbuild:[TAG]`
+
+## Build Tags
+
+- `1.10.3-main` - linux/{amd64,386} and windows/{amd64,386}
+- `1.10.3-arm` - linux/{armv5,armv6,armv7,arm64}
+- `1.10.3-darwin` - darwin/{amd64,386}
+- `1.10.3-ppc` - linux/{ppc64,ppc64le}
+- `1.10.3-mips` - linux/{mips,mipsle,mips64,mips64le}
+- `1.10.3-s390x` - linux/s390x
+- `1.10.3-main-debian7` - linux/{amd64,386} and windows/{amd64,386} (Debian 7
+  uses glibc 2.13 so the resulting binaries (if dynamically linked) have greater
+  compatibility.)
+
+## Usage Example
+
+```sh
+docker run -it --rm \
+  -v $GOPATH/src/github.com/user/go-project:/go/src/github.com/user/go-project \
+  -w /go/src/github.com/user/go-project \
+  -env CGO_ENABLED=1 \
+  docker.elastic.co/beats-dev/golang-crossbuild:1.10.3-arm \
+  --build-cmd "make build" \
+  -p "linux/armv7"
+```
+
+This will execute your projects `make build` target. While executing the build
+command the following variables with be added to the environment: GOOS, GOARCH,
+GOARM, PLATFORM_ID, CC, and CXX.

fpm/.dockerignore

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+Makefile

fpm/Dockerfile

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+FROM debian:stable
+LABEL maintainer="Elastic Beats Team"
+
+RUN \
+    apt-get update && \
+    apt-get install -y --no-install-recommends \
+        autoconf build-essential libffi-dev ruby-dev rpm zip dos2unix libgmp3-dev \
+        curl make gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+ARG SUEXEC_VERSION=0.2
+ARG SUEXEC_DOWNLOAD_URL=https://github.com/ncopa/su-exec/archive/v${SUEXEC_VERSION}.tar.gz
+ARG SUEXEC_DOWNLOAD_SHA256=ec4acbd8cde6ceeb2be67eda1f46c709758af6db35cacbcde41baac349855e25
+
+RUN \
+    curl -fsSL "$SUEXEC_DOWNLOAD_URL" -o suexec.tar.gz \
+    && echo "$SUEXEC_DOWNLOAD_SHA256  suexec.tar.gz" | sha256sum -c - \
+    && mkdir /suexec \
+    && tar -C /suexec --strip-components=1 -xzf suexec.tar.gz \
+    && make -C /suexec \
+    && mv /suexec/su-exec /usr/bin/ \
+    && rm -rf /suexec suexec.tar.gz
+
+ARG FPM_VERSION
+RUN gem install fpm -v "$FPM_VERSION"
+
+COPY rootfs /
+
+ENTRYPOINT  ["/entrypoint.sh"]
+
+# Build-time metadata as defined at http://label-schema.org.
+ARG BUILD_DATE
+ARG IMAGE
+ARG VCS_REF
+ARG VCS_URL
+LABEL org.label-schema.build-date=$BUILD_DATE \
+      org.label-schema.name=$IMAGE \
+      org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.vcs-url=$VCS_URL \
+      org.label-schema.schema-version="1.0"

fpm/Makefile

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+include ../Makefile.common
+
+NAME    := fpm
+VERSION := 1.10.0
+
+build:
+	@echo ">> Building $(REPOSITORY)/$(NAME):$(VERSION)$(SUFFIX)"
+	@docker build -t "$(REPOSITORY)/$(NAME):$(VERSION)$(SUFFIX)" \
+	--build-arg FPM_VERSION=$(VERSION) \
+	--build-arg IMAGE="$(REPOSITORY)/$(NAME):$(VERSION)$(SUFFIX)$(TAG_EXTENSION)" \
+	--build-arg VCS_REF="$(VCS_REF)" \
+	--build-arg VCS_URL="$(VCS_URL)" \
+	--build-arg BUILD_DATE="$(BUILD_DATE)" \
+	.
+
+.PHONY: build

fpm/rootfs/entrypoint.sh

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+#!/usr/bin/env sh
+
+if [ -z ${EXEC_UID+x} ] || [ -z ${EXEC_GID+x} ]; then
+  exec "$@"
+fi
+
+groupadd -f -g "$EXEC_GID" fpm
+useradd -N -m -c 'FPM User' -u "$EXEC_UID" -g "$EXEC_GID" fpm
+
+su-exec fpm "$@"

go1.10/Makefile

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+IMAGES := base main darwin arm mips ppc s390x
+
+build:
+	@$(foreach var,$(IMAGES),$(MAKE) -C $(var) build || exit 1;)
+
+# Requires login at https://docker.elastic.co:7000/.
+push:
+	@$(foreach var,$(IMAGES),$(MAKE) -C $(var) push || exit 1;)
+
+.PHONY: build push